package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioProperties minioProperties;

    @Autowired
    private MinioClient minioClient;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        //判断是否有桶
        boolean bucketExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());
        // 没有桶就创建桶,并且设置访问权限
        if (!bucketExists) {
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder().bucket(minioProperties.getBucketName())
                    .config(createBucketPolicyConfig(minioProperties.getBucketName())).build());
        }

        // 文件上传处理(对象名需要去重处理)
        // 处理对象名(文件名),文件名重复
        String filename = new SimpleDateFormat("yyyyMMss").format(new Date()) + "/"
                + UUID.randomUUID().toString().replaceAll("-","") + "_" + file.getOriginalFilename();
        minioClient.putObject(PutObjectArgs.builder()
                        .bucket(minioProperties.getBucketName())
                        .object(filename)
                        .stream(file.getInputStream(),file.getSize(),-1)
                        .contentType(file.getContentType())
                .build());

        // 返回文件访问路径
        String join = String.join("/",minioProperties.getEndpoint(),minioProperties.getBucketName(),filename);
        System.out.println("join = " + join);
        return join;
    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
